/**
 *  Copyright 2009 Henning Teek, Ingo Renner
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *  http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License. 
 */
package com.googlecode.chigscommons.web.common.table;

import java.util.Iterator;
import java.util.List;

import org.apache.wicket.extensions.markup.html.repeater.util.SortParam;
import org.apache.wicket.spring.injection.annot.SpringBean;
import org.synyx.hades.domain.AbstractPersistable;

import com.googlecode.chigscommons.repository.GenericDomainService;

/**
 * Generische Dataprovider, der die üblichen Zugriffe auf Domainobjekte eines Typs regelt.
 * Hauptsachlich für Auflistung in Tabellen und Aufzählungen.
 * Zuerst erstellt für die Ajaxfallbacktable
 * 
 * @author Ingo Renner
 * @author Henning Teek
 *
 * @param <T>
 */
public class DefaultDataProvider<T extends AbstractPersistable<Long>> extends DataProvider<T> {
	@SpringBean
	private GenericDomainService genericDomainService;

	public DefaultDataProvider(T domainObject) {
		super(domainObject);
	}

	@Override
	public Iterator<? extends T> iterator(int from, int count) {
		final SortParam sort = getSort();
		List<T> resultList = genericDomainService.loadAll(getType(), from, count, sort != null ? sort.getProperty() : null, sort == null || sort.isAscending());
		return resultList.iterator();
	}

	@Override
	public int size() {
		return genericDomainService.getCount(getType());
	}
}
